Look at how pontoon airplanes reduce drag on water, andflying boats like the Catalina ; they use stepped hulls to reducefriction and some are good for 80 to 100mph. Then there's hydroplanesand so on, all good for 150mph + . And behind and in front of the "step", theydo other stuff also to keep the water from attaching to the s hulls ; haven'tseen any of that stuff tried yet.

One of the class rules states the max lenght of fins cannot exceed 500mm.This rule was established in 2010/11 to pretend development of crazy & expensive fins as it had happened in Formula Windsurfing (a 70cm g10 blade worth tons of $$$)

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